Collaborate Disseminate
I was trying to encrypt and sign MIME data using openssl smime command.
I have below MIME data –
From:"=?ISO-8859-1?B?3M0SEg=?=" <abc@dcc.final>
Subject:=?ISO-8859-1?B?yNA==?=
=?ISO-8859-1?B?3IDE4?=
=?ISO-8859-1?B?OjE0?=
… Continue reading How to add MIME headers in encrypt and sign SMIME data using openssl smime command
I have a very strange problem and i would like to get some guidance on this.
Problem description:
My application is sending S/MIME signed Email messages to clients. It worked perfectly no problems were reported and also in my mail client a… Continue reading Guidance: S/MIME Signed Certificate invalid for many clients even though it worked previously and still works
RFC 4262, "X.509 Certificate Extension for Secure/Multipurpose Internet Mail Extensions (S/MIME) Capabilities", defines the S/MIME Capabilities Extension which allows to communicate through the X.509 certificate the encryption al… Continue reading Any client still supporting the S/MIME Capabilities Extension in 2023?
Our company, A, needs to send sensitive information (such as credentials) via Outlook to companies B and C. To protect the information, we plan to use the S/MIME standard to digitally sign or encrypt the message.
Will companies B and C be … Continue reading How to use S/MIME for secure sending of sensitive information? [migrated]
What is the most secure way and privacy-focused to send email now (current tech)? PGP or S/MIME, Given both parties willing to learn the technical parts?
Use case, both of parties use third party email services, like gmail/hotmail/proton… Continue reading What is the most secure way to send email now? PGP or S/MIME, Given both parties willing to learn the technical parts
We’re receiving signed and encrypted mails from many senders. For most senders, the decryption with openssl works fine using the following command:
openssl cms -decrypt -recip <path-to-key> -in <path-to-email>
However, for som… Continue reading Incomplete decryption of S/MIME mails using openssl cms
If I send an email through S/MIME protocol to a group of recipients, does the email client require to encrypt the same email content with each recipient’s public key before sending to each recipient? If the email is sent to a big Distribut… Continue reading Does S/MIME encryption encrypt with each recipient’s key?
https://dev.gnupg.org/T6097
I am trying to get GnuPG to work with my SmartCard-HSM 4K on Windows, using the GP4Win bundle.
Kleopatra doesn’t recognise the SC-HSM 4K at all, even though, it does recognise the YubiKey 5 NFC in both PIV and O… Continue reading GnuPG: gpa.exe hangs when I click on "smartcards" AND scdaemon cannot recognise SC-HSM 4K
I am trying to investigate openssl S/MIME in order to both sign and encrypt loads to be transfered over an untrusted network.
Loads need to be protected in authenticity and confidentiality.
I have already implemented a bash script rather l… Continue reading openssl smime sign and encrypt loads
On an iPhone I have a mail account in the native Mail app with two distinct e-mail addresses, and a certificate that lists both of those e-mail addresses in the SAN field. When I try to send mail with one of the two addresses in the "… Continue reading iOS (iPhone) S/MIME certificate with multiple addresses